20123123220340 has 48 divisors (see below), whose sum is σ = 48296325168000. Its totient is φ = 6899238041472.

The previous prime is 20123123220301. The next prime is 20123123220391. The reversal of 20123123220340 is 4302232132102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7149211 + ... + 9558109.

It is an arithmetic number, because the mean of its divisors is an integer number (1006173441000).

Almost surely, 2^{20123123220340} is an apocalyptic number.

20123123220340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123123220340 is an abundant number, since it is smaller than the sum of its proper divisors (28173201947660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123123220340 is a wasteful number, since it uses less digits than its factorization.

20123123220340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468584 (or 2468582 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20123123220340 its reverse (4302232132102), we get a palindrome (24425355352442).

The spelling of 20123123220340 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-three million, two hundred twenty thousand, three hundred forty".